Improvement in feed-gages for printing-presses



2 sheets-heer 2. S. D. TUCKER.

Feed-Gages forv Printing-Presses. N0.|68,7685'. Y

Patlled Oct. HI, 1875.

n.FYERS. PHOTOMTHDGRAPAER. WASHINGTON. D. C.

UNITED (STATES PATENT OEErcE.

STEPHEN D. TUCKER., OF NEW YORK, N. Y.

IMPROVEMENT IN FEED-GAGES FAOR PRINTING-PRESSES.

Specification forming part of Letters Patent N o. 168,685, dated October 11, 1875 application filed June 23, 1875.

CASE B.

To all whom .it may concern:

Beit known that I, STEPHEN D. TUCKER, of N ew York city, N. Y., haveinvented an Improvement in Feed-Gages for Printin g-Presses, of which the following is a specification:

In the accompanying drawings, forming part of this specification, in which like letters indicate the same parts, Figure l is an enlarged side view of the gage, partly in section, showing :its relation to the feed-table and its operating-shaft. Fig. 2 is a top view of part ofa printing-press, showing a set of gages mounted upon their operating-shaft and the means for actuating them; and Fig. 3 is an end view of the same parts.

The object of my invention is to prevent the edge of the paper which is presented to the gage from being lifted when Athe latter is raised to permit the gripers on the cylinder to seize and carry the paper into the press. It consists in devices by means of which the gage is caused toV retreat from the paper before being raised, to clear its path of movement into the press.

In its general features this gage does not materially differ from the device made the subject-matter of a companion' application. It is adapted, as is usual, to be mounted upon a rock-shaft, L, which is vibrated by means of a crank-arm, a, connecting-rod b, frictionroller c, and a cam, d, fast on `the cylindershaft e. The gage C `is adjustable by a setscrew to fixed positions on the gage-arm D,

and the latter, by its screw-threaded stem, is

independently adjustable longitudinally in a sleeve, E, supported by an arm, G, which projects from the stock S, being actuated by 4means of a nut, F, having its bearings between theV arm G and a second arm, H, which rises from the stock S. These devices provide a ready means for a nice adjustment of the gage relatively to the feed-table B. The stock S is cut away or divided by a recess, which has a curved front side and is open at the rear, thus forming two arms, I J, which are adapted to so straddle the rock-shaft L that their inner faces shall rest thereon. The stock S of the gage-arm is hung between the sides of the bifurcated hub 0, which is fastened to the shaft L by a set-screw, N, by its arms I J, which are, respectively, connected thereto by curved exible metal straps or springs K M, which are held at their opposite ends by screws t m a n. The 'upper strap or spring K forms a flexible hinge, which provides for the oscillation of the gage-arm upon the hub O, and the lower strap M,being slotted, as shown in the detached view, operates, by means of the screw a which plays therein, as a stop to limit the extent of this oscillation, for a purpose which will presently appear.

When va sheet has been laid against theface of the gages C, and the gripers on the cylinder A are about to grasp the sheet, the rear-V ward vibration of the rock-shaft L is commenced, which, bei-ng communicated -to the gage-arm D by means of the metal strap K, draws it backward with it until the gage is in the position indicated by dotted lines in Fig. l, a shortdistance from the edge of the sheet. This movement of the rock-shaft continues until the screw or stop u reaches the rear end 0f the slot c in the strap M, against which it seats itself, and thereby causes the motion of the rock-shaft to be communicated, through the arm J, to 'the gage-arm, thus raising the latter vertically from the guard or iin ger X, which projects from the feed-board and overlies the cylinder, thus clearing the gage from the path of the sheet. When the limit of its upward movement has been reached, and a reverse motion of the rock-shaft takes place, after the sheet has passed the arm D is lowered until the gage again rests upon the nger X. A continuation of the motion of the shaft L forces the arm Dforward, through the medium of the plate K, until the stop u rests against the forward end of the slot c, and the gage C is in position for registering a new sheet. The function of the slot c may be that of a guide only, and the stock be so recessed that the surface I shall bear against the shaft L when the proper extent of rearward movement has been effected, and thus act as the stop or bearing by which the vertical movement is given to the arm D; or both may operate conjointly, or the surface t may form the stop or bearing fior one movement, and the slot c for the other. When larms which embrace the actuatingrock shaft,

to whichlit is connected by means of a iiexible strap, so as to swing thereon when a horizontal reciprocation is imparted toit, and having asuitable stop, which connects it tothe rocksha't-so as to produce its vertical movement,

' p substantially as described.

2. The combination of' the arms I J of the gage-arm with the flexible strap K and the rock-shaft L, substantially as described.

r3. The-combinationof the arms l J of the gagearm with flexible strap or spring K, slotted strap M, and rock-shaft L, substantially as described.

STEPHEN D. TUCKER.

' Witnesses:

JOHN H. LocKWooD, WM. C. STONE. 

